Fontawesome implementation

Just started to use V4, so far no major issues. I have an implementation question on font awesome. I manage to get it working in a smart field as per the sparse documentation page in the manual, using the SVG option. I am wondering if I can use the javascript tag with the css control on the icon. I embedded the header code string in head for reference ( assuming I do not need to add the tags). When I add in the font awesome string in the code section of the field, nothing happens. Am I missing something? I need better control of the icon size, the SVG is limited. TIA

On the Font Awesome Website just klick on “Copy Glyph”:
Bildschirmfoto 2022-04-05 um 20.31.41

and paste it as text:
Bildschirmfoto 2022-04-05 um 20.34.07

The Font will change to “symbol” and thats it:
Bildschirmfoto 2022-04-05 um 20.34.20

Result on page: